Lantern slide



july l 1924.

A. n.. MAW-:R

LANTERN SLIDE Filed April 9, 192:y

www5

j Patented July l, 1924.

"UNITED, STATES ALVIN L. MAYBE, OF LONG ISLAND CITY, NEW YORK.

LANTERN SLIDE.

Application led pril 9,

To all whom t may conce/m.'

Be it known that I, ALVIN L. MAYER, a citizen of the United States,residing at Long Island City, in the county of Queens and State of NewYork, have invented certain new and useful Improvements in LanternSlides, of which the following is a specification.

This invention relates to slides for projecting machines, such as magiclanterns, sterescopes, motion picture machines and the like, in whichpictures, advertisements, an-

nouncements, etc., are printed or otherwise` formed on plates of glassor other suitable transparent material of proper size for use in themachines. Such slides are now very largely used in motion picturemachines, and commonly the glass plates are assembled for the purpose ofhandling them while in use, or during packing or transportation; Myinvention involves frames for the plates which may be quickly made atsmall cost, may be easily applied to the plates and when so applied willprotect them from breakage orinjury.

In carrying out my invention, I form the frame of a plurality of layersof paper or pulp board so formed and so assembled as to hold the pictureplate securely in place and to protect it from injury. The plate is of asize considerably less than that of the slide as a whole, thus savingglass and reducing the weight of the slide.

In one form of the invention a blank is employed, scored to form threesections of equal size, each of the sections having a projectionopening, the two openingsv in the endsections being of the same size,while the opening in the middle section is of larger area. The plate isfitted orlocated in the opening of the middle section and the endsections are folded in' opposite directions and brought into contactwith opposite sides of the middle section. Inasmuch as the openings inthe end sections are smaller than the opening in the middle section andthe plate which it contains, the marginal portions of the end framesections overlap the edges of the plate and thus securely hold itin'place.

The frame sections when folded may be secured together in any suitableway.

In order that the emulsion or film side c of the plate may be furtherprotected d ur- 192s. serial No. 631,025.

ing transportation, the opening .in one of the end sections may betemporaril closed by a shield which is easily detached before the plateis exposed.

In another form of the invention the three-part frame is made of threeseparate .pieces instead of being made from a single lntegral blank.

In the accompanying drawings Figure 1 is a plan view of a frame blankonstructed in accordance with my invenion.

Figure 2 shows a section of the blank illustrated in Figure 1 andillustrates how the end sections are folded upon the middle section. v

Figure 3 is a sectional view, indicating how the glass plate is locatedin the middle section and how the end sections are folded upon andbrought into contact with the middle section.

Figure 4 is a view on an enlarged scale, showing in section thecompleted slide with a glass plate held and protected in the frame.

Figure 5 is a perspective view of a section of a slide consisting of atransparent plate and a frame made up of three separate sections securedtogether.

The blank shown in Figure 1 is scored on opposite sides, as indicated aty, y to form the three frame sections A, B and C which are all ofsubstantially the same size. These sections are formed with projectionopenings A', B', C the openings A and C in the end sections being of thesame dimensions, while the opening B in.

the middle section is of greater area. The marginal portions 0;, a', a2,als of section A are adapted to register with the marginal portions c,c', c2, c3 of the section C when the blank is folded, as indicated inFigure 4.

Figure 2 illustrates the manner in which the end sections are foldedupon the middle section, and Figure 3 indicates how the plate is locatedjust before. it enters the opening B. One of the end sections, such asC, may be folded upon the middle section so that its inner marginalportions may form a rest for the plate and then the plate may be Ilocated and positioned in the opening of the middle section. The otherframe section, such as A, may then be folded upon the middle section andthen the marginal portions of the several sections may be securedtogether by cement or in'other suitable Ways.

In orde-r to protect the emulsion or film side ofthe plate duringtransportation I may provide a shield marked A2 in Figures l, 2 and 4.This shield completely covers the emulsion or lm side ofthe plate and isan additional protection during transportation, making it unnecessary toplace protecting layers between the slides during transportation. Such ashield may be formed in the blank shown in Figure l in either or both ofthe sections but only one such shield is necessary. As indicated at theleft hand side of Figure 1, the blank isslit or slotted on the lines 1,2, 3 4, leaving uncut parts 5, 6, 7, 8, and 9 which attach the shield A2to the marginal portions of the end section. I also preferably cut out asmall part of the shield at l0 so that a tool or the thumb nail may beinserted in this opening and by this means the shield may be detachedfrom the frame before the slide is used for projection purposes. Whilethe shield A2 is not essential it is really a useful device. It is shownin Figures 1, 2 and 4, but is not shown in Figure 3, indicating that theshield may or may not be used.

The completed slide, shown in Figure 4, is of lantern slide size forstandard machines. A single piece of glass is used and this is muchsmaller than the glass ordinarily employed, thus saving the more eX-pensive glass and reducing the Weight of the slide. The slide thusformed has the glass protected on all four edges and in the use of theslide the glass is not apt to come in contact with any object whichwould injure it. The slides may be conveniently packed fortransportation, with the glassl plates properly separated and minimumspace is occupied by the slides when packed.

In Figure 5 a slide is shown which is similiar to that shown in Figure 4except that the frame sections are made separately instead of beingformed from a single blank. The sections or layers D and E are of thesame size and shape, while the middle section F, although of the sameexterior dimensions, has a projection opening of larger size to receivethe plate Gr Which is of the same size as the opening in the middlelayer. When the parts are assembled the edges of the plate arecompletely enclosed and when the sections are fastened by suitabledevices, as indicated at e, the plate will be securely held in place.

In Figure 5 I have shown a shield G2 similiar to that shown in Figure 1and I prefer to use such a shield.

Lantern slides as usually constructed contain -tvvo glass plates, onebearing the picture or other object to be projected and the other beingemployed to protect the picture plate. Each yo1" these plates is ofstandard lantern slide size and the two plates are commonly boundtogether by passepartout or similar material. Slides made in this wayare expensive. A large amount of glass in each slide is used and theslides are heavy Ito handle and make transportation charges ar e.

y my improvements a single piece of glass ispused, thus affording aconsiderable savmg 1n the material and this expense is still furtherdecreased by reason of the fact that the glass is ,of materially lessarea than the slide as a Whole. The single glass plate is completelyprotected from breakage or injury in handling, packing or transportationand is adapted for use in standard machines.

The transparency shield employed is also an important feature of theinvention. As before stated, a single shield may be used to protect oneside of the transparency or shields may be employed to protect bothsides thereof.

I claim as my invention 1. A lantern slide comprising three permanentlyjoined sections or layers folded the one upon the other formed from asingle piece of material and each having a projection opening in it, theopening in the middle section being of greater area than the openings inthe other sections and a transparent member closely fitted in theopening of the middle section and Which is overlapped on opposite sidesbythe marginal parts of the other sections.

2. A lantern slide comprising three permanently joined sections formedfrom a single piece of material, the two outer sections being foldedflat-Wise on the middle section, each section having a projectionopening in it, the opening in the middle section being of greater areathan the openings in the other sections and a transparent member closelyfitted in the opening of the mid dle section and which is overlapped onopposite sides by the marginal portions of the other sections.

3. A frame blank for a lantern slide plate or transparency consisting ofthree permanently joined foldable sections or layers formed from asingle piece of material and each having a projection opening in it, theopening in the middle section being of greater area than the opening inthe other sections.

4. A lantern slide comprising three sections each having a projectionopening in it, the opening in the middle section being of greater areathan those in the outer sections, a transparent member fitted in themiddle sections and which is overlapped by the marginal portions of theouter sections and a shield held temporarily in the opening of one ofthe outer sections.

aandoet 5, A lanternslide comprising three sections formed from a singlepiece of material and each having a projection opening in it, theopening in the middlesection being of greater area than those in theouter insertion of a finger or tool to facilitate in withdrawing theshield from the trame.

7. A lantern slide transparency frame comprising sections or layershaving projection openings in them for exposing the transparency andsupporting a removable protecting shield connected with the margin ofthe frame by readily breakable parts and thus detachably connected withthe frame and having a cut away portion for the insertion of finger ortool to facilitate in withdrawing the shield from the frame.

8. A lantern slide comprising a frame consisting of a plurality oflayers having projection openings in them, a transparent member forprojection purposes within the frame, and a shield for protecting thetransparent member during transportation which 1s supported in theframe, covers one side of the transparent member and is bodily removablefrom the frame to expose the transparent member for projection purposes.

9. A lantern slide comprising a frame consisting of a plurality oflayers having projection openings in them, a transparent member forprojection purposes within the frame, and shields for protecting bothsides of the transparent member during transportation which aresupported in the frame and are bodily removable from the frame to exposethe transparent member for projection purposes.

1Q. A lantern slide comprising three sections or layerseach having aprojection opening in it, the opening in the middle layer being ofgreater area than the opening in the outer layers, a transparent memberfor projection purposes fitted in the opening of the middle layer, and ashield to protect the transparent member during transportation which issupported in one of the outer layers and is bodily removable therefromto expose the transparent member for projection purposes.

1l. A frame for a lantern slide: comprising three layers each having aprojection opening in it, the opening in the middle layer being ofgreater area than the opening in the outer layer to receive atransparent member and a shield temporarily supported in the opening ofone of the layers adapted to cover and protect `the transparent memberduring transportation but which is bodily removed from the frame forprojection purposes.

Y In testimony whereof, I have hereunto subscribed my name.

ALVIN L. MA YER. l

